Portable negative pressure drainage device used after breast augmentation

The utility model discloses a portable negative pressure drainage device used after breast augmentation. The problem that an existing drainage device cannot meet the psychological requirements of a patient subjected to the breast augmentation operation is effectively solved. Comprising an up-down axial transparent cylindrical shell, a piston is coaxially and slidably connected in the cylindrical shell, a pull rod is coaxially arranged at the upper end of the piston through a connecting plate, up-down guide plates are arranged at the left end and the right end of the pull rod respectively, guide grooves corresponding to the guide plates are formed in the left side and the right side of the upper end of the cylindrical shell respectively, and the guide plates can slide out of the cylindrical shell through the guide grooves. Baffles capable of making contact with the guide plates are arranged on the front side and the rear side of the upper end of the cylindrical shell respectively, a drainage tube is arranged a